| leukemia | <haematology> An acute or chronic disease of unknown cause in man and other warm blooded animals that involves the blood forming organs, is characterised by an abnormal increase in the number of leucocytes in the tissues of the body with or without a corresponding increase of those in the circulating blood and is classified according of the type leucocyte most prominently involved. (18 Nov 1997) |
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| anaemia, aplastic | A form of anaemia in which the bone marrow fails to produce adequate numbers of peripheral blood elements. (12 Dec 1998) |
| aplastic | <pathology> Lacking in cell production, as in aplastic anaemia. Origin: Gr. Plassein = to form (27 Sep 1997) |
| aplastic anaemia | <haematology> This form of anaemia occurs when the bone marrow ceases sufficient red and white blood cell production. It may be induced by exposures to high levels of toxic chemicals, radiation and certain drugs. It is generally unresponsive to specific therapy, often accompanied by granulocytopenia and thrombocytopenia, in which the bone marrow may not necessarily be hypocellular or hypoplastic but fails to produce adequate numbers of peripheral blood elements. The term actually is all inclusive and most probably encompasses several clinical syndromes. Origin: Gr. Haima = blood (29 Sep 1997) |
| aplastic lymph | Lymph containing a relatively large number of leukocytes, but comparatively little fibrinogen; such lymph does not form a good clot and manifests only a slight tendency to become organised. Synonym: corpuscular lymph. (05 Mar 2000) |
| congenital aplastic anaemia | <haematology> A rare inherited type of aplastic anaemia which carries an increased risk to the patient of developing leukaemia. May be treated by bone marrow transplant. Origin: Gr. Haima = blood (13 Nov 1997) |